Recall that cultivated bananas are often at greater risk of bacterial or fungal infection compared to their wild counterparts. Why? Select all correct choices
A. Cultivated bananas reproduce asexually.
B. Cultivated bananas reproduce sexually.
C. Ample genetic diversity exists in cultivated
bananas.
D. Genetic diversity is limited in cultivated
bananas.
A,D
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Measurements show that the pH of a particular lake is 4.0. What is the hydroxide ion concentration of the lake?
A) 10-10 M B) 10-4 M C) 10-7 M D) 10.0 M
When tracing the path of blood, the blood vessles that follows the renal artery is the
a. peritubular capillary b. efferent arteriole c. afferent arteriole d. renal vein
Punctuated equilibrium proposed by Eldredge and Gould in 1972 is an evolutionary process that involves
A. gradual change observable in the fossil record with very little, if any, stasis. B. gradual change observable in the fossil record followed by periods of no change at all. C. "spurts" of change observable in the fossil record with very little if any stasis. D. gradual change observable in the fossil record followed by periods of stasis. E. "spurts" of change observable in the fossil record followed by periods of stasis.
In a food chain with four trophic levels, what would be the energy in the top trophic level if the energy contained in the primary producer level is 40,000 kcal/m2/yr? Assume a trophic level transfer efficiency of 10%.
A. 4,000 kcal/m2/yr B. 40 kcal/m2/yr C. 0.4 kcal/m2/yr D. 4 kcal/m2/yr E. 400 kcal/m2/yr